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Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics

Carbon dioxide (CO2) is considered as the prime reason for the global warming effect and one of the useful ways to transform it into an array of valuable products is through electrochemical reduction of CO2 (ERC). This process requires an efficient electrocatalyst with high faradaic efficiency at lo...

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Main Authors: Hossain, S. K. Safdar, Saleem, Junaid, Rahman, SleemUr, Zaidi, Syed Mohammed Javaid, McKay, Gordon, Cheng, C. K.
Format: Article
Language:English
English
Published: MDPI 2019
Subjects:
TP Chemical technology
Online Access:http://umpir.ump.edu.my/id/eprint/24661/1/Synthesis%20and%20Evaluation%20of%20Copper-Supported%20Titanium%20Oxide%20Nanotubes.pdf
http://umpir.ump.edu.my/id/eprint/24661/2/Supplementary%20material.pdf
http://umpir.ump.edu.my/id/eprint/24661/
https://doi.org/10.3390/catal9030298
https://doi.org/10.3390/catal9030298
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spelling my.ump.umpir.246612019-04-01T04:06:36Z http://umpir.ump.edu.my/id/eprint/24661/ Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics Hossain, S. K. Safdar Saleem, Junaid Rahman, SleemUr Zaidi, Syed Mohammed Javaid McKay, Gordon Cheng, C. K. TP Chemical technology Carbon dioxide (CO2) is considered as the prime reason for the global warming effect and one of the useful ways to transform it into an array of valuable products is through electrochemical reduction of CO2 (ERC). This process requires an efficient electrocatalyst with high faradaic efficiency at low overpotential and enhanced reaction rate. Herein, we report an innovative way of reducing CO2 using copper-metal supported on titanium oxide nanotubes (TNT) electrocatalysts. The TNT support material was synthesized using alkaline hydrothermal process with Degussa (P-25) as a starting material. Copper nanoparticles were anchored on the TNT by homogeneous deposition-precipitation method (HDP) with urea as precipitating agent. The prepared catalysts were tested in a home-made H-cell with 0.5 M NaHCO3 aqueous solution in order to examine their activity for ERC and the optimum copper loading. Continuous gas-phase ERC was carried out in a solid polymer electrolyte (SPE) reactor. The 10% Cu/TNT catalysts were employed in the gas diffusion layer (GDL) on the cathode side with Pt-Ru/C on the anode side. Faradaic efficiencies for the three major products namely methanol, methane, and CO were found to be 4%, 3%, and 10%, respectively at −2.5 V with an overall current density of 120 mA/cm2. The addition of TNT significantly increased the catalytic activity of electrocatalyst for ERC. It is mainly attributed to their better stability towards oxidation, increased CO2 adsorption capacity and stabilization of the reaction intermediate, layered titanates, and larger surface area (400 m2/g) as compared with other support materials. Considering the low cost of TNT, it is anticipated that TNT support electrocatalyst for ECR will gain popularity MDPI 2019 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/24661/1/Synthesis%20and%20Evaluation%20of%20Copper-Supported%20Titanium%20Oxide%20Nanotubes.pdf pdf en http://umpir.ump.edu.my/id/eprint/24661/2/Supplementary%20material.pdf Hossain, S. K. Safdar and Saleem, Junaid and Rahman, SleemUr and Zaidi, Syed Mohammed Javaid and McKay, Gordon and Cheng, C. K. (2019) Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics. Catalysts, 9 (3). pp. 1-19. ISSN 2073-4344 https://doi.org/10.3390/catal9030298 https://doi.org/10.3390/catal9030298
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
English
topic TP Chemical technology
spellingShingle TP Chemical technology
Hossain, S. K. Safdar
Saleem, Junaid
Rahman, SleemUr
Zaidi, Syed Mohammed Javaid
McKay, Gordon
Cheng, C. K.
Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics
description Carbon dioxide (CO2) is considered as the prime reason for the global warming effect and one of the useful ways to transform it into an array of valuable products is through electrochemical reduction of CO2 (ERC). This process requires an efficient electrocatalyst with high faradaic efficiency at low overpotential and enhanced reaction rate. Herein, we report an innovative way of reducing CO2 using copper-metal supported on titanium oxide nanotubes (TNT) electrocatalysts. The TNT support material was synthesized using alkaline hydrothermal process with Degussa (P-25) as a starting material. Copper nanoparticles were anchored on the TNT by homogeneous deposition-precipitation method (HDP) with urea as precipitating agent. The prepared catalysts were tested in a home-made H-cell with 0.5 M NaHCO3 aqueous solution in order to examine their activity for ERC and the optimum copper loading. Continuous gas-phase ERC was carried out in a solid polymer electrolyte (SPE) reactor. The 10% Cu/TNT catalysts were employed in the gas diffusion layer (GDL) on the cathode side with Pt-Ru/C on the anode side. Faradaic efficiencies for the three major products namely methanol, methane, and CO were found to be 4%, 3%, and 10%, respectively at −2.5 V with an overall current density of 120 mA/cm2. The addition of TNT significantly increased the catalytic activity of electrocatalyst for ERC. It is mainly attributed to their better stability towards oxidation, increased CO2 adsorption capacity and stabilization of the reaction intermediate, layered titanates, and larger surface area (400 m2/g) as compared with other support materials. Considering the low cost of TNT, it is anticipated that TNT support electrocatalyst for ECR will gain popularity
format Article
author Hossain, S. K. Safdar
Saleem, Junaid
Rahman, SleemUr
Zaidi, Syed Mohammed Javaid
McKay, Gordon
Cheng, C. K.
author_facet Hossain, S. K. Safdar
Saleem, Junaid
Rahman, SleemUr
Zaidi, Syed Mohammed Javaid
McKay, Gordon
Cheng, C. K.
author_sort Hossain, S. K. Safdar
title Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics
title_short Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics
title_full Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics
title_fullStr Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics
title_full_unstemmed Synthesis and Evaluation of Copper-Supported Titanium Oxide Nanotubes as Electrocatalyst for the Electrochemical Reduction of Carbon Oxide to Organics
title_sort synthesis and evaluation of copper-supported titanium oxide nanotubes as electrocatalyst for the electrochemical reduction of carbon oxide to organics
publisher MDPI
publishDate 2019
url http://umpir.ump.edu.my/id/eprint/24661/1/Synthesis%20and%20Evaluation%20of%20Copper-Supported%20Titanium%20Oxide%20Nanotubes.pdf
http://umpir.ump.edu.my/id/eprint/24661/2/Supplementary%20material.pdf
http://umpir.ump.edu.my/id/eprint/24661/
https://doi.org/10.3390/catal9030298
https://doi.org/10.3390/catal9030298
_version_ 1643669881556566016
score 13.211869

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